/*
 * Tencent is pleased to support the open source community by making BK-CI 蓝鲸持续集成平台 available.
 *
 * Copyright (C) 2020 THL A29 Limited, a Tencent company.  All rights reserved.
 *
 * BK-CI 蓝鲸持续集成平台 is licensed under the MIT license.
 *
 * A copy of the MIT License is included in this file.
 *
 *
 * Terms of the MIT License:
 * ---------------------------------------------------
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package com.tencent.bkrepo.common.security.http.login

import com.tencent.bkrepo.common.security.http.core.HttpAuthSecurity
import org.slf4j.LoggerFactory
import org.springframework.beans.factory.ObjectProvider
import org.springframework.context.annotation.Configuration
import org.springframework.web.bind.annotation.ResponseBody
import org.springframework.web.servlet.mvc.method.RequestMappingInfo
import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping
import javax.annotation.PostConstruct
import kotlin.reflect.jvm.javaMethod

@Configuration(proxyBeanMethods = false)
class LoginConfiguration(
    private val httpAuthSecurity: ObjectProvider<HttpAuthSecurity>,
    private val requestMappingHandlerMapping: RequestMappingHandlerMapping
) {

    @PostConstruct
    fun init() {
        httpAuthSecurity.stream().forEach {
            registerLoginHandler(it)
        }
    }

    private fun registerLoginHandler(httpAuthSecurity: HttpAuthSecurity) {
        httpAuthSecurity.authHandlerList.forEach { handler ->
            handler.getLoginEndpoint()?.let {
                val loginEndpoint = httpAuthSecurity.formatEndPoint(it)
                registerLoginEndpoint(loginEndpoint)
            }
        }
    }

    private fun registerLoginEndpoint(endpoint: String) {
        val mappingInfo = RequestMappingInfo.paths(endpoint).build()
        requestMappingHandlerMapping.registerMapping(mappingInfo, this, this::anonymous.javaMethod!!)
        logger.info("Registering login handler[$endpoint].")
    }

    /**
     * a trick method for registering request mapping dynamiclly in spring interceptor
     */
    @ResponseBody
    private fun anonymous() = Unit

    companion object {
        private val logger = LoggerFactory.getLogger(LoginConfiguration::class.java)
    }
}
